Metallic rotary teazles for textile machines



United States Patent 3,307,237 METALLIC ROTARY TEAZLES FOR TEXTILEMACHINES Albert Cesar Scholaert, Residence Maimaison 503B, Tourcoing,France Filed Sept. 2, 1964, Ser. No. 393,962 Claims priority,application France, Sept. 20, 1963, 948,196 3 Claims. (Cl. 2631) Thisinvention relates to assemblies of rotary metallic teazles for textilemachines, of the type constituted by a rotary body, the circumferentialsurface of which is covered with a metallic clothing, such as a card orloop clothing, while the ends thereof are each provided with a circularcheek and are mounted in such a way as to be able to rotate in the twoends of a support, this support comprising a part which is designed tobe fixed to the cylindrical or polygonal surface of a rotary drum.

Rotary metallic teazles of this type are usually mounted between pointedtips, or else by means of cylindrical pivots forming either part of therotary teazle or of its support, and engaging in corresponding recesses.

One of the greatest ditficulties encountered in the satisfactoryproduction of such teazles resides in the tendency of the long fibres towind themselves around the pivots, whether the pivots are integral withthe teazle and rotate with it, or whether the pivots are fixed to thesupport. Presently, in the textile industry, synthetic fibers arecommonly used, which become charged with static electricity during thenapping operations, so that the said fibres have a tendency to beattracted by the various elements that constitute the teazle assembly.and, in particular to assume a position more favourable to their windingabout the pivots, which is obviously harmful to the satisfactory workingof the teazle.

The object of the invention is to provide a rotary teazle assembly of aparticular construction which aims at preventing the winding of thefibres around the pivots, and the consequent locking of the teazle.

With this end in view, according to the invention, the two ends of theteazle assembly are provided with movable protective elements, adapted,under the action of the pressure exerted by the cloth to be napped,against which the teazle is rolling, to cover the gap between each cheekand the corresponding end of the support on the side opposite to thatpart of the support that is designed to be fixed to the drum.

Due to this particular construction, the gap between the fixed androtary parts of the assembly, into which fibres would have a tendency tomove, is closed at the very moment when the teazle comes into contactwith the cloth and at the precise place which is located in theneighbourhood of the said cloth, though the teazle is not subjected toany braking action that would hamper its rotary motion, since the saidmovable protective elements are liberated in those parts of the teazlewhich at any time are located away from the cloth, and when the teazleis located on a portion of the drum which is itself remote from thecloth in the course of the rotation of the said drum.

The invention likewise contemplates forms of construction comprising atleast one of the following characteristic features:

(a) The movable protective element, at each end of the support, isconstituted by a rotary diaphragm, flexible and resilient, co-axial withthe teazle, and of a diameter greater than that of the teazle, andsufiiciently great to enable the said diaphragm, in folding down, tocover the gap between the cheek and the corresponding end of thesupport.

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(b) The teazle is designed to be mounted obliquely in relation to thegenerating lines of the drum and the two diaphragms are constituted bytwo washers, one of which is mounted loose on that end of the supportwhich is designed to arrive first against the cloth to be treated, andthe other, fixed to the teazle, against the corresponding cheek.

(c) The washer mounted on the support is arranged against the outer faceof the latter.

(d) The washer fixed to the teazle is arranged against the inner face ofthe corresponding cheek.

(e) The part of each end of the support opposite to the part of thesupport designed to be fixed to the drum is in the form of an arc of acircle co-axial with the teazle, and of a radius less than that of thecorresponding cheek.

(f) At least one end of the teazle, preferably the end that does notcarry a washer, is provided with a toothed wheel for rotatably drivingthe said teazle of an external diameter substantially equal to that ofthe teazle including the clothing.

(g) The ends of the teazle are hollowed out, and are each engaged overone of two pivots, fixedly secured to the corresponding ends of thesupport.

The invention will be better understood from the following descriptionand the appended drawings, which show, by way of example but not oflimitation, one form of construction of a rotary metallic teazleassembly according to the invention.

In these drawings:

FIGURE 1 is a longitudinal section of the rotary teazle assembly, takenalong the line II in FIGURE 2;

FIGURE 2 is an end view looking in the direction of the arrow II inFIGURE 1', and

FIGURE 3 shows diagrammatically the relative positions of the rotaryteazle assembly and the drum designed to support it.

The rotary metallic teazle assembly for a textile machine illustrated inthe drawings comprises a bobbin 1, consisting of a rotatable body, ofwood, for example, or of any other suitable material, thecircumferential surface of which is covered with a suitable cardclothing 2.

In the two ends of the bobbin 1 are embedded two spikes 3 and 4-, thecylindrically shaped external heads of which are provided with hollows 5and 6, engaging over two stationary pivots or trunnions 7 and 8respectively, which are fixed in a support, designated as a whole byreference numeral 9.

The support 9 comprises a base plate 12 and two end walls 13 and 14,perpendicular to the base-plate 12. The base-plate 12 is designed to befixed to the cylindrical surface of a drum 15 (FIGURE 3), by means, forexample, of screws introduced into holes 16 and 17 in the base-plate 12.The assembly is designed to be mounted upon the drum in such a way thatthe geometrical axis of the rotary teazle makes an angle a with thegenerating lines of the drum 15.

'In the example, the teazle proper is removably mounted upon itssupport, and for this purpose, while one of the pivots, 7 for example,is solid with the corresponding end 13 of the support 9, the other pivot8 is removable, and consists, for example, of a reduced cylindrical endof a screw 21, mounted in the other end 14 of the support, and providedwith a large knurled head 35. The depth of the hollow 5 for the spike 3is slightly shorter than the space between the other end of the assemblyand the inner face of the wall 14 of the support, so that the assemblycan easily be pulled out after the screw 21 has been unscrewed.

Between the ends of the bobbin 1 and the heads of the two spikes areconfined the bottoms of two cups or cheeks 25 and 26, the margins ofwhich are of a diameter nearly the same as that of the teazle includingthe card clothing 2. The upper ends of the Walls '13 and 14 of thesupport are arcs of circles co-axial with the teazle, and of a radiusless than that of the margins of the cups 25 and 26.

On one end of the bobbin is also fixed a toothed wheel 29 for rotatablydriving the teazle.

The two ends of the assembly are provided with movable protectiveelements, in the form of rotary diaphragms, flexible and resilient,consisting, for example, of two washers 32 and 33, of natural orsynthetic rubher, for example, one mounted upon one end of the bobbin,and the other upon the opposite end of the support.

The washer 32 is gripped between the inner face of the cheek 25 and thecorresponding end of the bobbin 1, while the other Washer 33 is mountedloosely upon a washer 22, which is held against the outer face of theend wall 14 of the support 9, by the large knurled head 35 of the screw21. The latter also axially retains the washer 33, the thickness ofwhichis slightly less than that of the washer 22, so that the protectivewasher 33 is not blocked, :but on the contrary can rotate freely.

The external diameter of the two protective washers 32 and 33 is greaterthan the diameter of the teazle including the card clothing 2, so thatwhen the teazle comes into contact with the cloth 4-0 to be napped, thecloth folds down the corresponding portions of the said washers over thegaps between the cheeks and the corresponding ends of the support.

Thus, in vie-w of the inclination of the teazle to the drum, the washer33, which is the first to come into contact with the cloth 40, is foldedback by the cloth, as indicated at 33a, against the upper part of theend wall 14 of the support and against the corresponding part of thecheek 26, the other parts of this Washer remaining planar. The otherwasher, 32, in turn comes into contact with the cloth, and is foldedback over the cheek 25 and against the upper part of the other end wall13 of the support, as indicated at 32a, the other parts of this washerlikewise remaining planar. A suitable diameter is given to theprotective washers 32 and 33, such that the gap between each cheek andthe corresponding upper end of the support will be temporarily closed,at the very moment when the fibres might have been able to slip in andreach the pivots, with the risk of ultimately locking the teazle againstrotation. During the whole time when the teazle is away from the cloth,the two protective washers remain planar, and consequently do not rubagainst the side wall of the support, or against the teazle. The rotarymotion of the teazle can therefore proceed by the acquired momentum, sothat the regularity of its operation is not disturbed by the protectivewashers.

The invention is not of course restricted to the form of constructiondescribed and illustrated, and modifications may be made therein withoutexceeding the scope of the invention.

Thus, for example, movable protective elements according to theinvention might be adopted for a metallic teazle assembly, the pivots ofwhich are rigidly secured to the bobbin, and turn in sockets in thesupport.

What is claimed is:

1. A cloth napping assembly for textile machines comprising: a supportconsisting of a base-plate mounted on a textile machine and two endwalls tip-standing from the base-plate, a bobbin rotatably mounted inthe end walls of the support, metallic card clothing covering thecircumferential surface of the bobbin, two circular cheeks, one at eachend of the bobbin, each spaced slightly inwardly from the adjacent endwall of the support, and two resilient, radially extending protectiveelements, one at each end of the assembly, the radial extent of the.protective members being greater than that of the bobbin and clothingthereon and adapted, when the cloth to 'be napped comes into contactwith them, to bend over and cover the gap between the cheek and theadjacent end wall of the support on each side of the assembly remotefrom the base-plate.

2. A cloth napping assembly as claimed in claim 1, wherein eachprotective element comprises a flexible and resilient rotary diaphragm,co-axial with the bobbin.

3. A cloth napping assembly as claimed in claim 2, wherein each flexibleprotective element comprises a washer, one of said elements beingmounted rotatably adjacent the external surface of the corresponding endwall and the other of said elements being fixed to the bobbin, beingsecured thereto by and resting against the corresponding cheek.

References Cited by the Examiner UNITED STATES PATENTS 3,060,544 10/1962Scholaert 26-3l FOREIGN PATENTS 506,962 6/ 1939 Great Britain. 820,3839/1959 Great Britain. 27,154 8/ 1932 Netherlands.

ROBERT R. MACKEY, Primary Examiner.

1. A CLOTH NAPPING ASSEMBLY FOR TEXTILE MACHINES COMPRISING: A SUPPORTCONSISTING OF A BASE-PLATE MOUNTED ON A TEXTILE MACHINE AND TWO ENDWALLS UP-STANDING FROM THE BASE-PLATE, A BOBBIN ROTATABLY MOUNTED IN THEEND WALLS OF THE SUPPORT, METALLIC CARD CLOTHING COVERING THECIRCUMFERENTIAL SURFACE OF THE BOBBIN, TWO CIRCULAR CHEEKS, ONE AT EACHEND OF THE BOBBIN, EACH SPACED SLIGHTLY INWARDLY FROM THE ADJACENT ENDWALL OF THE SUPPORT, AND TWO RESILIENT, RADIALLY EXTENDING PROTECTIVEELEMENTS, ONE AT EACH END OF THE ASSEMBLY, THE RADIAL EXTENT OF THEPROTECTIVE MEMBERS BEING GREATER THAN THAT OF THE BOBBIN AND CLOTHINGTHEREON AND ADAPTED, WHEN THE CLOTH TO BE NAPPED COMES INTO CONTACT WITHTHEM, TO BEND OVER AND COVER THE GAP BETWEEN THE CHECK AND THE ADJACENTEND WALL OF THE SUPPORT ON EACH SIDE OF THE ASSEMBLY REMOTE FROM THEBASE-PLATE.